Mercurial > repo
annotate ploki/random.c @ 4220:bd96abc7003f
<mauke> cd ploki && make
| author | HackBot |
|---|---|
| date | Fri, 20 Dec 2013 22:11:09 +0000 |
| parents | 7a6bc310b732 |
| children |
| rev | line source |
|---|---|
| 4215 | 1 #include "config.h" |
| 2 #include "random.h" | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 #include <stdlib.h> | |
| 6 #include <time.h> | |
| 7 | |
| 8 void randseed(void) { | |
| 9 unsigned seed; | |
| 10 | |
| 11 seed = time(NULL); | |
| 12 #if HAVE_DEV_URANDOM_P | |
| 13 { | |
| 14 FILE *fp; | |
| 15 | |
| 16 if ((fp = fopen("/dev/urandom", "rb"))) { | |
| 17 fread(&seed, sizeof seed, 1, fp); | |
| 18 fclose(fp); | |
| 19 } | |
| 20 } | |
| 21 #endif | |
| 22 srand(seed); | |
| 23 } | |
| 24 | |
| 25 double randval(void) { | |
| 26 return rand() / (RAND_MAX + 1.0); | |
| 27 } |